Lubricating-valve.



0. SENN & D. 0. DEMAREST.

LUBRIOATING VALVE.

APPLICATION FILED MAR.16, 1909.

Patented May 3, 1910.

UNITED STATES PATENT OFFICE.

CARD SENN, OF OAKLAND, AND DAVID C. DEMAREST, OF SAN FRANCISCO, CALIFORNIA.

LUBRICATING- VALVE.

To all whom it may concern:

Be it known that we, CARL SENN, of Oakland, Alameda county California, and DAVID C. DEMAREST, of the city and county of San Francisco, California, both citizens of the United States, have invented new and useful Improvements in Lubricating Valves, of which the following is a specification.

Our invention relates to lubricating valves and cocks, and pertains especially to a valve or cock for automatically lubricating the cylinders of rock-drills, and other air and steam actuated motors.

The air cock used on ordinary drills for admitting the air to the cylinder by which the drill is operated, generally is subjected to hard usage, being thrown to the ground when uncoupled and frequently filling with dirt. In all sel -lubricating cocks of which we have knowledge, the dirt and grit, on getting into the oil ducts in the valve, either clog the passages or cut the casing.

We have designed a self-lubricating cock or valve which can be thrown around indiscriminately without any danger of the dirt and grit getting into the oil ducts or between the plug and the casing and causing wear, or otherwise interfering with the operation of the same.

A further object of our invention is to provide a valve or cock which is simple in construction, of few parts, cheap to manufacture, durable and practical, and by which the desired oiling operations will be automaticall performed through the medium of the flui passing through the valve on the opening and closing of the latter.

The invention consists of the parts and the construction and combination of parts as hereinafter more fully described and claimed, having reference to the accompanying drawin s, in Which Figure l is a longitudinal section of our lubricating valve and its easing, the valve plug being open. Fig. Qis a lon itudinal sectlon at right angles to that 0 Fig. 1. Fig. 3 is a plan section on line X-X, Flg. 1.

A represents a valve casing of suitable size, shape and material having a conical chamber in which the conical valve plug 2 is adapted to seat. The lower or enlarged end of the casing A is closed by a cup-shaped cap 3 which cooperates with the bottom of the plug and the surrounding flange 4 on the bottom of the casin to inclose an oil chamber or reservoir 5; tllis reservoir being filled Specification of Letters Patent.

Application filed March 16, 1909.

Patented May 3, 1910. Serial No. 483,685.

at suitable intervals through a lateral opening, usually closed at all tlmes, except when the reservoir is being filled, by a plug (3. The valve plug has a port or opening 7 registerable with the respective inlet and outlet ports 8 and 9 in the casing. Turning the plug 2 to bring its port 7 at right angles to the ports 8 and 9 closes the valve, by cutting ofi' communication between the ports 8 and 9, and brings the port 7 into communication with the pockets 10 which are on the inside of the valve casing and between the ports 8 and 9, but which pockets 10 are at all times out of direct communication with ports 8 and 9.

The pockets 10 are adapted to be brought into communication with the oil reservoir 5 by means of the transversely extending port 11 in the plug, below and at right angles to port 7; and the port 11 is intersected by a port 12 which extends down through a tubular projection 13 carried by, and shown as integral with, the valve plug to a point adjacent to the bottom of the reservoir The plug also has a diagonally extending port let, with one end opening into the wit 7, and the other emerging at one side of the plug and adjacent to its lower edge. This diagonal air ort 14 is in communication with both the ive air passing through port 7 (from any suitable source of sup )1 as the air-compressor B Fig. and with the top of the oil reservoir 5 through a groove or slot 15 in the casing, when the valve is open. This permits the live air pressure in the open port 7 to create a correspondin ressure on to of the oil in reservoir 5, and

orce oil up t rough the ports 1211 into the pockets 10.

The moment the valve is closed, that is, when the plug is turned to interrupt communication between the ports 8 and 9, the port 7 is brought into register with the oil pockets 10, and the pressure in the now closed port 7 is vented through the small registering ports 16-17 in the valve plug and casing, and the oil which previously has been forced up into the pockets 10 will now flow into the open portion 7 of the plug, so that when the air valve is next turned on, a predetermined quantity of oil is blown through from the valve into the cylinder, or other parts of the machinery to be lubricated. hen the valve is opened the vent ports 16-17 are, of course, out of re ister, so there can be no escape of air. By t 1e use of a plain plug valve there are no grooves or pockets therein to be clogged up with dirt, when thrown on to the ground.

A spring 18 maintains the valve plug normally on its seat, and the valve stem 19 may be connected with any suitable form of a handle or crank, whereby the valve may be manipulated manually or mechanically.

The valve is automatic, it is cheap, simple, practical and durable, and the oil cap 3 is of such size that when removed, plenty of space is afforded by which all the reaming or machine work on the interior of the valve may be easily done; and the valve does not have to be turned over to fill.

Having thus described our invention, what we claim and desire to secure by Letters Patent is 1. A lubricating valve comprising a casing having a conical chamber, and a conical plug fitting in the chamber, said casing having an inlet and an outlet port registering with a corresponding port in the plug, said casing inclosing an oil reservoir, said plug having an air port connecting the aforesaid port in the plug with the top of the reservoir, and said plug having oil ducts connecting the reservoir with pockets in the casing, and which pockets are in communication with said first-named port in the plug when the plug is turned to cut off communication between said inlet and outlet ports in the casing.

2. A lubricating valve comprising a casing having a conical chamber, and a conical plug fitting in the chamber, said casing having an inlet and an out-let port registering-with a corresponding port in the plug, said casing inclosing an oil reservoir, said plug having an air port connecting the aforesaid port in the plug with the top of the reservoir, and said plug having oil ducts connecting the reservoir with pockets in the casing, which pockets are in communication with said firstnamed port in the plug when the plug is turned to cut off communication between said inlet and outlet ports in the casing, and said casing having a screw cup-shaped cap forming a closure and a bottom for said oil I'GSBTVOII'.

3. A lubricating valve comprising a casing having a conical chamber, and a conical plug fitting in the chamber, said casing having an inlet and an outlet port registering with a corresponding port in the plug, said casing inclosing an oil reservoir, said plug having an air port connecting the aforesaid port in the plug with the top of the reservoir, and said plug having oil ducts connecting the reservoir with pockets in the casing, which pockets are in communication wlth said first-named port in the plug when the plug is turned to cut off communication between said inlet and outlet ports in the casing, said casing having a screw cup-shaped cap forming a closure'and a bottom for said oil reservoir, and means by which the reservoir may be filled without inverting the valve.

4. A lubricating valve comprising a casing having inlet and outlet ports, a plug turnable in the casing and having, a port registerable with said inlet and outlet ports, said casing inclosing an oil reservoir, said plug having a tubular projection extending into the oil reservoir, and said plug and tubular projection having communicating ducts connecting the reservoir with a pocket in the casing, and which pocket is in communication only with the first-named port in the plug when the latter is turned to cut off communication between the inlet and outlet ports in the casing, and said plug having an air port connecting the first-named port in the plug with the oil reservoir.

In testimony whereof we have hereunto set our hands in presence of two subscribing witnesses.

CARL SENN. DAVID C. DEMAREST. Witnesses CHARLES A. PENFIELD, CHARLES EDELMAN. 

